Improvement in the manufacture of tin-foil



UNITED STATES PATENT OFFICE.

W. W. HUSE, OF BROOKLYN NEW YORK.

IMPROVEMENT IN THE MANUFACTURE OF TIN-FOIL.

Specification forming part of Letters Patent No. 23,088, dated March 1, 1859.

To all whom it may concern:

Be it known that I, WILLIAM W. Home, of

' the city of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in the Manufacture of Tin-Foil; and I do hereby declare that the following is a full, clear, and exact description of the same.

This invention consists in an improved mode of producing tin-foil with but an outer casing of tin or an alloy thereof enveloping entirely a filling of lead or an alloy thereof.

To enable others to make use of my invention, I will proceed to describe the manner in which it is performed.

I first obtain by casting or other means a cylindrical bolt of lead or of some alloy thereof, of convenient size-say about one foot in length and three inches in diameter-and, after cleaning the surface of the same by the use of muriatic or other suitable acid, I either without further preparation or after first coatlngit with a suitable flux dip it into a bath of melted tin or an alloy thereof, and after withdrawing it therefrom I pass itrepeatedly between pressure-rollers to roll it out into a flat sheet.

The dipping in the bath of tin may be repeated at such stages of the rolling as may be necessary, that the lead maybe always enveloped by a perfect coating of tin, and the rollingoperation is to be repeated till the metal is reduced to the required degree of thinness, and a sheet or foil having its exterior entirely of tin is produced. Before the first dipping in the bath of tin the bolt of lead may with advantage be dipped into or otherwise coated with a solution of zinc in muriatic acid, which forms an excellent flux to aid in the union of the tin with the lead.

Instead of performing the reducing process entirely by rolling, the earlier stages may be performed by the direct action of a hydraulic or other direct-acting press; but I prefer to use rollers throughout the process.

The reason for preferring to use a cylindrical bolt for the production of the sheet or foil is that I have ascertained by carefully-conducted experiments that by the use of that form I am enabled to obtain a more uniform distribution of the lead and tin in the foil, more especially toward the edges of the sheet, than by using an ingot of lead of square or flat form, never failing by commencing with such form to confine the lead in the middle of the sheet and to have the tin equally distributed on both faces, and always producing a sounder margin and therefore less waste at each side of the sheet.

I do not claim to have invented .the manufacture of tin-foil with a filling of lead; but

What I claim as myinvention, and desire to secure by Letters Patent, is-

The production of tin-foil having but an outer casing of tin or its alloy covering a filling'of lead or its alloy by the reduction by pressure of acylindrical boltot thelatter metal or alloy which has been previously coated by dipping with the former metal or alloy and the repetition of the dipping atsuitable stages of the reducing process, substantially as herein described.

WILLIAM W. HUSE. I Witnesses: WM. TUSGH,

W. HAUFF. 

